ath79: add support for 8devices Rambutan board

Rambutan is a Wifi module based on QCA9550/9557
http://www.8devices.com/products/rambutan

Specification:

- 720/600/200 MHz (CPU/DDR/AHB)
- 128 MB of DDR2 RAM
- 128 MB of NAND Flash
- 1x 100Mbps Ethernet
- 1x 1000Mbps Ethernet (PHY on dev-kit)
- 1x Wifi radio 2x2 MIMO, dualband 2.4 and 5 GHz
- 2x U.FL connectors on module, chip antennas on dev-kit
- 1x miniPCIe slot
- 2x USB2.0 host
- 2x UART
- SPI, I2C, GPIO

Flash instructions:

Upgrade from ar71xx target:
 sysupgrade -F /tmp/openwrt-ath79-nand-8dev_rambutan-squashfs-sysupgrade.tar
or upgrade from GUI (don't save config)

Use factory image to flash from U-Boot:
 tftpboot 80060000 openwrt-ath79-nand-8dev_rambutan-squashfs-factory.ubi
 nand erase.part ubi
 nand write 80060000 ubi ${filesize}

Signed-off-by: Petr Štetiar <ynezz@true.cz> [copy&pasted missing commit description]
Signed-off-by: Andrey Bondar <a.bondar@8devices.com>

target/linux/ath79/config-4.19

@@ -18,6 +18,7 @@ CONFIG_ARCH_USE_BUILTIN_BSWAP=y
 CONFIG_ARCH_USE_QUEUED_RWLOCKS=y
 CONFIG_ARCH_USE_QUEUED_SPINLOCKS=y
 CONFIG_ARCH_WANT_IPC_PARSE_VERSION=y
+CONFIG_AT803X_PHY=y
 CONFIG_ATH79=y
 CONFIG_ATH79_WDT=y
 CONFIG_BLK_MQ_PCI=y

target/linux/ath79/config-5.4

@@ -23,6 +23,7 @@ CONFIG_ARCH_USE_QUEUED_RWLOCKS=y
 CONFIG_ARCH_USE_QUEUED_SPINLOCKS=y
 CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT=y
 CONFIG_ARCH_WANT_IPC_PARSE_VERSION=y
+CONFIG_AT803X_PHY=y
 CONFIG_ATH79=y
 CONFIG_ATH79_WDT=y
 CONFIG_BLK_MQ_PCI=y

target/linux/ath79/dts/qca9557_8dev_rambutan.dts

@@ -0,0 +1,131 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/dts-v1/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+#include "qca955x.dtsi"
+
+/ {
+	compatible = "8dev,rambutan", "qca,qca9557";
+	model = "8devices Rambutan";
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			gpios = <&gpio 18 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+			debounce-interval = <60>;
+		};
+	};
+};
+
+&nand {
+	status = "okay";
+
+	partitions {
+		compatible = "fixed-partitions";
+
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		partition@0 {
+			label = "u-boot";
+			reg = <0x0 0x300000>;
+			read-only;
+		};
+
+		partition@300000 {
+			label = "u-boot-env";
+			reg = <0x300000 0x200000>;
+		};
+
+		art: partition@500000 {
+			label = "art";
+			reg = <0x500000 0x100000>;
+			read-only;
+		};
+
+		partition@600000 {
+			label = "ubi";
+			reg = <0x600000 0x7a00000>;
+		};
+	};
+};
+
+&mdio0 {
+	status = "okay";
+
+	phy0: ethernet-phy@0 {
+		reg = <0>;
+		reset-gpios = <&gpio 17 GPIO_ACTIVE_LOW>;
+	};
+};
+
+&mdio1 {
+	status = "okay";
+
+	phy1: ethernet-phy@0 {
+		reg = <0>;
+		reset-gpios = <&gpio 23 GPIO_ACTIVE_LOW>;
+		phy-mode = "sgmii";
+		at803x-override-sgmii-link-check;
+	};
+};
+
+&eth0 {
+	status = "okay";
+
+	mtd-mac-address = <&art 0x0>;
+	phy-mode = "mii";
+	phy-handle = <&phy0>;
+};
+
+&eth1 {
+	status = "okay";
+
+	pll-data = <0x17000000 0x101 0x1313>;
+	phy-handle = <&phy1>;
+	phy-mode = "sgmii";
+	qca955x-sgmii-fixup;
+	mtd-mac-address = <&art 0x6>;
+};
+
+&wmac {
+	status = "okay";
+
+	gpio-controller;
+	mtd-cal-data = <&art 0x1000>;
+};
+
+&pcie0 {
+	status = "okay";
+};
+
+&usb_phy0 {
+	status = "okay";
+};
+
+&usb0 {
+	status = "okay";
+
+	#address-cells = <1>;
+	#size-cells = <0>;
+};
+
+&usb_phy1 {
+	status = "okay";
+};
+
+&usb1 {
+	status = "okay";
+
+	#address-cells = <1>;
+	#size-cells = <0>;
+};
+
+&uart {
+	status = "okay";
+};

target/linux/ath79/image/nand.mk

@@ -30,6 +30,21 @@ define Build/zyxel-factory
 		fi
 endef
 
+define Device/8dev_rambutan
+  SOC := qca9557
+  DEVICE_VENDOR := 8devices
+  DEVICE_MODEL := Rambutan
+  DEVICE_PACKAGES := kmod-usb2
+  BLOCKSIZE := 128k
+  PAGESIZE := 2048
+  KERNEL_SIZE := 4096k
+  KERNEL_IN_UBI := 1
+  IMAGES := factory.bin sysupgrade.tar
+  IMAGE/sysupgrade.tar := sysupgrade-tar | append-metadata
+  IMAGE/factory.bin := append-ubi
+endef
+TARGET_DEVICES += 8dev_rambutan
+
 define Device/aerohive_hiveap-121
   SOC := ar9344
   DEVICE_VENDOR := Aerohive

target/linux/ath79/nand/base-files/etc/hotplug.d/firmware/10-ath9k-eeprom

@@ -9,6 +9,9 @@ board=$(board_name)
 case "$FIRMWARE" in
 "ath9k-eeprom-ahb-18100000.wmac.bin")
 	case $board in
+	8dev,rambutan)
+		caldata_extract "caldata" 0x1000 0x800
+		;;
 	netgear,wndr3700-v4|\
 	netgear,wndr4300|\
 	netgear,wndr4300sw|\